1. Productivity determines relations of production, and economic base determines superstructure. The Warring States period was a period of social change from slave society to feudal society, and the slave owner economy gradually changed to feudal landlord and small peasant economy, which was the decisive reason. The troubled times of the merger war provided the survival soil for a hundred schools of thought to contend. With the emergence of the later unification, Emperor Wu of the Han Dynasty deposed a hundred schools of Confucianism.

2. Since ancient times, China has claimed to be a country of etiquette, and China is a kingdom. A gentleman values righteousness over profit, so some feudal literati think that it is an insult to associate and trade with barbarians, and should not be rude for petty gain. This is a very narrow feudal thought. China closed its doors to the outside world in ancient times, especially in the Qing Dynasty, and its thoughts were blocked to an unimaginable extent. Someone actually wrote to the emperor that westerners eat beef and mutton, which is too greasy. If the Qing dynasty didn't export tea to them, they would die of too greasy food. It can be said to be ridiculous, which directly led to the humiliating history of China for nearly a hundred years.